Method for nondestructively detecting draw resistance of cigarette sections of cigarette

Abstract

The invention relates to a method for nondestructively detecting the draw resistance of the cigarette sections of a cigarette. According to the method, on the basis of a plurality of states between measured parameters, total pressure drop, the gas flow of a filter vent hole and the position of the filter vent hole of the cigarette under three states are measured. With the method adopted, the influence of cigarette paper is eliminated in a calculation process on the premise that a draw resistance relation between the cigarette paper and cut tobacco sections cannot be determined. On the basis ofa cigarette draw resistance measurement method, the measurement of the draw resistance of each part of the cigarette is realized, calculation errors caused by the uncertainty of a relation between the cigarette paper and the cut tobacco sections is reduced, and meanwhile, the coating treatment of the cigarette is also reduced (from three times to two times). The detection method and measurement data are more scientific, reasonable, accurate and more practical. Practical engineering requirements for providing basic support for cigarette product quality tracing, product design and process optimization are satisfied.

Description

technical field [0001] The invention relates to the technical field of cigarette quality detection, in particular to a method for rapidly and nondestructively detecting segmental draw resistance of cigarettes. Background technique [0002] Cigarette draw resistance is an important indicator for evaluating the physical quality of cigarettes. If the draw resistance of cigarettes is too high, the cigarettes will become difficult to smoke, while if it is too small, the smoke will be excessively diluted, which will affect the sensory quality of cigarette products. The measurement of the draw resistance of cigarettes usually adopts GB / T 22838.5-2009 "Determination of Physical Properties of Cigarettes and Filter Rods_Part 5: Cigarette Draw Resistance and Pressure Drop of Filter Rods", which can realize the fully automatic operation of cigarette draw resistance measurement With control, the above method realizes the measurement of cigarette open draw resistance and closed draw resis...

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Problems solved by technology

[0005] The Chinese patent (publication number: CN108918382A) obtains the draw resistance of each segment of the cigarette through the flow conservation relationship formed by the "quasi-series" method of the cigarette in multiple states (also the applicant's previous application for this case), but in realizing During the process, due to the way of closing the end face of the cigarette, it is easy to cause the change of the air flow inside the cigarette, which will affect the calculation results of the draw resistance of each segment of the cigarette, resulting in a large error

[0006] The Chinese patent (publication number: CN109527646A) also obtains the draw resistance of each segment of the cigarette through the flow conservation relationship formed by the "quasi-series" mode of the cigarette in multiple states (also the applicant's previous application in this case), compared with the aforementioned The method reduces the test status of cigarettes (from six to four), and does not seal the end faces of cigarettes, which has little influence on the airflow inside the cigarettes. The flow data of the paper is used to calculate the air flow of the shredded tobacco section. Due to the incomplete parallel relationship between the shredded tobacco section and the cigarette paper, the calculation of the air flow of the shredded tobacco section is inaccurate, which leads to a large error in the calculation of the draw resistance of the shredded tobacco section.

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